Optics: measuring and testing – For optical fiber or waveguide inspection
Reexamination Certificate
2006-05-30
2006-05-30
Nguyen, Tu T. (Department: 2877)
Optics: measuring and testing
For optical fiber or waveguide inspection
Reexamination Certificate
active
07053996
ABSTRACT:
An optical transmission system is provided by preparing a two-photon transition medium where efficiency of two-photon transition does not depend on polarization; splitting an optical pulse to be measured into a probe optical pulse and a gate optical pulse by a polarization independent beam splitter; after adding variable delay time to this gate optical pulse, entering the probe optical pulse and the gate optical pulse into a highly efficient two-photon absorption medium so that both of the pulses cross each other, and thereby generating an optical gate function; resolving a spectrum of the transmitted probe optical pulse, and detecting the spectrum by a photodetector; and measuring intensity of electric-field absorption of the probe optical pulse as a function of delay time and a frequency.
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patent: 6219142 (2001-04-01), Kane
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patent: 2002/0156592 (2002-10-01), Taira et al.
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“Improved Ultrashort Pulse-Retrieval Algorithm for Frequency-Resolved Optical Gating,” K. Delong et al., 1994 Optical Society of America.
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Bussan Nanotech Research Institute, Inc.
Nguyen Tu T.
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